'Parabolas vertex' diaporamas de présentation

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Parabolas

Parabolas. p = a number that tells you where the focus and directrix are ( h.k ) = coordinates of the vertex Focus= point inside the parabola (add p to one coordinate of the vertex) Directrix = line behind the parabola The focus and directrix are equidistant from the vertex.

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9.2

9.2. Parabolas. A parabola is the set of all points P in the plane that are equidistant from a fixed point F ( focus ) and a fixed line d ( directrix ). Other definitions: The line that goes through the focus F and perpendicular to the directrix D is called the axis of symmetry .

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